Anvil clinching stapling machine



4 Sheets-Sheet 1 may 1.7, T949 w. scHAl-'ROTH ANVIL CLINCHING STAPLING'MACHINE Filed NOV. 30, 1945 INVENTOR: Mfr/vif? 5mn/war# HKU L msATTORNEY File Nov; 50, 1945 4 Sheets-Sheet 2 INVENTOR Wsw/5R 5cl/RaraHIS ATTORNEY May 17, 1949.. w. scAFRo'l-H ANVIL CLINCHING STAPLI-NG.MACHINE 4 snee'tsfsheet :5

Filed Nov. 30, 1945 has INVENTOR; Wimvf 5am-Rar# I #am rHS ATTORN EY May17, 1949. w. scHAFRTl-'r' ANVIL lCLINoHINGf STAPLING MACHINE 4Sheets-Sheetr 4 Filed NOV. 30,' 1945 INVENTOR: MmMJr/war# HIS ATTORNEYPatented May 17, 1949 ANVIL CLINCHING STAPLING MACHINE WernerSchafrotli, Brookline, Pa., assigner to International Staple and MachineCompany,

Clifton Heights, Pa., a corporation of Pennsylvania Application November30, 1945, Serial No. 631,965

5 Claims.

This invention relates to stapling machines and particularly to staplingmachines used to secure the aps or ends of closed cartons or containersWhere the staple is driven into the carton and then means is insertedfor clinching the ends thereof.

The invention is an improvement over similar machines of my priorpatents, No. 2,080,634, dated May 18, 1937, and No. 2,234,808, datedMarch 4, 1941, in that the piercing anvils are directly actuated bypositive links and levers instead of cams or other means, and theoperation of the anvils is delayed until the staples are in place.

The stapling machine of the type with which this invention is concernedincludes as characteristic elements a plunger for driving the staples inplace, and a pair of penetrating semi-circular anvils actuated bysuitable operating instrumentalities, including levers connecteddirectly to the anvils and influenced by cam tracks in a sliding plungerto rotatively operate the anvils to pierce the material being stapledand clinch the ends oi the staples against the inner surfaces of thematerials being stapled,

The purpose of this invention is to provide mechanical means for drivingstaples through naps or ends of closed cartons and actuate stapleclinching anvils to pierce the material, clinch the inner ends of thestaples and then Withdraw the anvils leaving the staples in place.

The machines of my prior patents above noted first actuate the anvils topositions directly below the ends of the staples and as the staples aredriven inward the curvature of the anvils causes the ends of the.staples to assume clinching positions, and after this operation iscompleted the anvils are Withdrawn.

Owing to peculiar conditions in some cartons and other objects ordevices, it is necessary to first drive the staple into place and thenactuate the anvils to bend the ends of the staple to clinching positionsand then Withdraw the anvils.

Due to the complex nature of the movement which is imparted to thepenetrating anvils during their piercing and clinching operations, it isnecessary to provide links and levers directly connected to the anvilsand actuated by rollers in cam grooves in a plunger. In View of the factthat the staple is first driven by the same instrumentalites, themovement of the penetrating anvils must necessarily be delayed until thestaple actuating devices have driven the staple into place. The stapleoperating mechanism must then be stopped and held so that the staple isfirmly gripped and forced against the material, although the movement ofthe staple operating mechanism must remain still While the sameactuating mechanism operates the anvils through the piercing andclinching operation.

This combination of operations causes excessive Wear on cam tracks orgrooves yclosely associated with the staple driving means or the anviloperating ldevices and, therefore, these devices must be actuated bycams operating through levers and links with the levers and linksdirectly associated With the staple driving device and anvils.

Driving and .holding the staples before actuating the anvils also makesit necessary to separate the instrumentalitiesthrough which the twodevices are operated at points closely associated with the said devicesand at the same time operate both through a common plunger.

The object of this invention is therefore to provide an improved`stapling machine for closed cartons, containers and the like, which rstdrives a staple through flaps or ends of the cartons with the ends ofthe staples piercing the said aps or ends and extending considerablyinward and then introduce clinching means that pierces the parts beingstapled and engages the ends of the staples, and then forces themagainst the inner surfaces of the layers of material being stapledproviding clinching means.

More in detail this invention has in view as a further objective, theprovision of a stapling machine of the type noted which includes amovable guide plunger with a lever forcing the plunger downward togetherwith associated operating instrumentalities that cause the plunger to bemoved into position, whereby levers pivotally mounted on the casing andconnected to staple driving means and anvils by links, are actuated bycams on the levers extending into cam tracks in the plunger to force thestaples through the material being stapled and the piercing anvils alsothrough the material to clinch the ends of the staples.

Associated with this phase of the 4stapling machine is an extremelyimportant objective which aims at the provision of a machine in Whichthe operations of the penetrating anvils, staple guide plate Aand stapledriving mechanism are accurately and positively;A4 .synchronized so asto insure `of proper operation of the machine.

Yet another object is associated with this phase of the invention anddeals with the provisie-n of novel and improved driving connectionsbetween the staple driving means 'and the pentrating 3 anvils and theoperating instrumentalities 'therefor.

In order to meet present day conditions prevailing in the manufacture ofcardboard cartons, and other similar packages which are intended to beclosed by the stapling machine oi this invention, and particularly inview of the toughness of the materials which must be pierced in order tocarry out the stapling operations, it necessary that the operatinginstrumentalities of the machine be effective to drive the stapledriving mechanism and the penetrating anvils with extremely highvelocity.

The creation of these high velocities gives rise to the setting up of alarge number of sharp shocks and jars, which, if taken up by the machinealone, greatly reduces the service life thereof.

Accordingly the invention has in View, as a highly important objective,the provision of an arrangement in which the material being operatedupon (such as the flaps of a corrugated cardboard carton) takes up alarge portion or the shocks and jars which are an inevitable incident tothe operation of the machine.

Yet another highly. important object of the invention is the provisionof a novel and improved casing structure that is designed to house thevarious means, mechanisms and instrumentalities making up the machine ofthis invention.

More in detail the invention has in View the provision of a casingstructure which serves to operatively mount various parts of themechanisms included therein. The casing structure must be readilyassembled and dissembled as occasion demands, and an important phase ofthe invention is the novel constructional features imparting theseproperties thereto. 'It is important that the casing structure be sodesigned that the machine may be readily manipulated and handled underconditions o practical usage.

Various other more detailed objects and advantages such as arise inconnection with the building, design and operation of a stapling machinein accordance with the above noted objectives will in part becomeapparent, and in part be hereinafter stated, as the description of theinvention proceeds.

The use or relatively tough materials, such as heavy cardboard,plastics, and materials formed of other compositions, present problemsin connection with the usual stapling machines and therefore machines ofthis improved design and operation, and particularly in which thestaples are rst driven into place and the ends then clinched against thematerials, have been found necessary.

The invention therefore comprises a stapling machine including stapledriving mechanism, a pair of penetrating anvils pivotally mountedadjacent the end of the machine and adapted to be actuated beyond thesaid end of the machine, links rigidly attached to the anvils, leverspivotally attached to the links and to the machine, other leverspivotally mounted in the machine and positioned to operate the stapledriving means, a common plunger slidably mounted in the machine andhaving cam tracks therein for operating both the staple driving, andanvil operating levers through rollers from the said levers extendinginto the said tracks, and a handle through which the plunger may beoperated to rst actuate the staple driving means with the anviloperating means remaining stationary and, after the staple driving meanshas been actuated to its eXtreme movement, the anvil operating means isoperated to clinch the ends of the staple with the staple driving meansremaining stationary.

For a full and more complete understanding reference may be had to thefollowing descrip tion and accompanying drawings wherein:

Figure l is a view showing a side elevation of the stapling machine withthe head or vertical section thereof shown in section.

Figure 2 is a view showing a front elevation of the machine with thefront removed.

Figure 3 is a sectional plan showing the mounting of the anvils.

Figure 4l is a detail showing one of the anvils.

Figure 5 is a sectional view through the rear portion of the machine online 5 5 of Figure 1 and with the handle omitted.

Figure 6 is a vertical section through the machine with the thickness ofthe machine illustrated on an enlarged scale.

Figure 7 is a View similar to that shown in Figure 5 with the interiorof the casing indicated by dash lines and with the plunger moveddownward through the movement in which the staple driving plunger isactuated and in which the anvil operating means remains stationary.

Figure 8 a similar view showing the plunger moved to its extremeposition during the movement in which the anvils are operated.

Figure 9 is a cross section through the upper portion or the machine,taken on line 9 9 of Figure 2, illustrating the relative positions ofthe parts.

Referring now to the drawings wherein like reference characters denotecorresponding parts, numeral lll indicates a sliding cam block, numerali l a casing and numeral l2 a handle by which the stapling machine ismanually operated.

The block lil is vertical slidable in grooves I3 and ld in the casing ll, and the upper end is provided with ears l5 and i6 between which a barll of the handle i2 is pivotally mounted on a pin i8. The block l@actuates, rst a plunger l@ which drives a staple, and then as itssliding movement continues, operates anvils or clinching ngers 2@ andEl, which bend under and clinch the ends of the staple as illustrated inFigure 8.

The plunger E9 is also slidable in the casing l E and this is mounted ina slot 22 at the center of the rear of the casing and is positioned topick up a staple 23 from a strip 2li extending through an opening 25 andheld inward by a follower 25 on a bar 2l'. The bar and follower areincorporated in a leg 28 extending at the rear of the machine and thefollower is resiliently held by a spring 29. It will be understood,however, that staples may be fed to the machine by any means or in anymanner.

The plunger i9 is operated by levers 3o and 3i as illustrated in Figures5, 7 and 8, and these levers are pivotally mounted in the casing on pins32 and 33. The opposite ends of the levers are formed with slots 3d and35 into which a pin 36 on the plunger I9 extends as illustrated inFigure 6. Rollers 37 and 38 are also mounted on the levers 3G and 3|respectively and 'these rollers extend into cam slots 39 and ill! in therear of the block Ill, and it will be noted that as the block isactuated by the handle I2 so that it will slide downward the rollers 3land 38 will be forced downward until they arrive at their respectivepositions shown in Figure 7, and during this movement the levers 3E) and3l will move downward from their position shown in Figure 5 to theirpositions in Figure '7, This downward movement of the levers 3o and 3lmoves the pin 36 on the plunger IQ and also the plunger downward fromthe position shown in Figure 5 to that shown in Figures '7 and 8, andduring this movement of the plunger the staple is forced downward anddriven through the layers oi material to be stapled and against whichthe chine is held. This rst step of the downward movement of the blockEil therefore drives the staple downward and through the materialwhereas the anvils remain stationary and do not begin to move until thestaple is in place.

The anvils 2K3 and El are rotatably mounted in the lower part of themachine and positioned so that as they are rotated they will `extendbeyond the end of the machine and pierce the material against which themachine is placed. The anvils are formed as illustrated in Figure Ilwith piercing points lil at the end of semi-circular sections 42, andthese are integral with hubs t3 on shafts 44. One anvil only isillustrated in Figure i and this is indicated by the numeral 2d, and itwill be understood that the other anvil 2l is similar although oppositehand. The anvil 2l is provided with a shaft l5 and on the opposite endsof the shafts are arms iii and lil, which are connected by links als andlis to arms 5o and 5i. The arms 5@ and 5l are pivotally mounted on astationary pin 52 in the front of the casing and connected at theiropposite ends to the links s3 and dit by pins 53 and 5d on which rollers5h and Sii are rotatably mounted. The opposite ends of the links i8 andlil are pivotally connected to the arms it and di by pins 5l and 53.

The rollers 55 and 5'0" extend into cam slots 59 and Eil in the blockiii, and it will be noted that as the biock moves downward from theposition shown in Figure 5 to that shown in Figure '7 the verticalsections of the slots 5S and 6l) pass downward over the rollers, therebyholding the anvil operating mechanism stationary. This movement ashereinbefore described operates the plunger lil to drive the staple, theanvils remaining stationary. At this point the staple is in its eXtremeposition as shown in Figure 'l and then as the block Iii continues tomove downward from the position illustrated in Figure 'Z to thatillustrated in Figure 8, the rollers 55 and 5t follow the horizontalportions of the slots si? and to, moving inward to their respectivepositions shown in Figure 8, and during this movement draw the ends ofthe levers 5i! and 5l and the links d8 and 49 inward to their positionsshown in dotted lines, and this movement actuates the anvils throughtheir respective arms d6 and dl, the arms assuming horizontal positionsand the anvils te and Zi piercing the material, or layers of material,and at the same time engaging the extending ends of the staples andbending them inward and against the inner surfaces of the materials, asillustrated in Figure 3.

During this movement of the block iii, the rollers 3l and 33 of thelevers Sil and 3i remain stationary, being held in this position by thevertical sections oi the cam slots 39 and to, thereby holding the staplein the driven position during the operation of the clinching anvils.

The operation is now completed, and the handle may be drawn upward tothe original position, and during this movement the block iii is drawnupward and this aotuates the anvils to return to their originalpositions and also withdraws the staple driving plunger is to itsoriginal position.

The casing l! may be formed as shown in the drawings with a cover plate6l and an inten mediate partition 62' in which the anvils are rotatablymounted as shown in Figure 3. The partition may be frictionally held inthe lower portions of the slots I3 and i4 as illustrated or held in anymanner. At the upper end of the casing are extending ears t3 betweenwhich the end of the handle bar I 'l is pivotally mounted through a linkSii and pins 65 and t. rThe upper end of the casing may also be providedwith slots 61 and B3 to receive the bar il as the handle moves downward.

The lconstruction of the stapling machine should be readily understoodfrom the foregoing description.

In use the machine may be provided as shown and described and withstaples extending through the slot 25, the handle l2 may be drawndownward, and as the handle is drawn downward it forces the slidingblock I!) downward in the casing. The block rst actuates the plunger I9to drive the staple with the anvils remaining stationary and then holdsthe staple driving means stationary as it forces the anvils through thematerial and against the extending ends of the staple to clinch the saidends against the inner surface of the material being stapled. The handleis then drawn upward and the operation of the stapling machine iscomplete.

While a preferred specic embodiment of the invention is hereinbefore setforth, it is to be clearly understood that the invention is not to belimited to the exact construction illustrated and described becausevarious modifications of these details may be provided in putting theinvention into practice within the purview of the appended claims.

What is claimed is:

l. In a stapling machine, a frame, a sliding block movably mounted onthe frame, a handle by which said block may be operated, a stapledriving plunger arranged on the frame and operatively connected to andmovable by said block, staple clinching anvils arranged on the frame andoperatively connected to and movable by said block, cam means on saidblock and inuencing said plunger, and other cam means on the blockinuencing the anvils, said last-mentioned cam means being arranged belowthe first-mentioned cam means and operable subsequently thereto.

2. In a stapling machine, a sliding block, said block having cam trackstherein, a handle by which said block may be moved, a staple drivingplunger operatively connected to said block and having its movementinfluenced by the said cam tracks, other cam tracks in said block, andstaple clinching anvils operatively connected to the block and havingtheir movement influenced by said other cam tracks in the block.

3. In a staple machine, a frame, a member slidably mounted on saidframe, said member having cam tracks therein, a staple driving plunger,means connecting the plunger to the cam tracks, staple clinching anvils,other cam tracks in the said member, and a plurality ofinstrumentalities operably connecting the anvils to the last-mentionedcam tracks.

4. In a stapling machine of the kind described, in combination, a frame,a member slidably mounted in said frame, a plunger hingedly connected tosaid member, a plurality of links mechanically connected to saidplunger, a pair of anvils, a second plurality of links operablyconnecting the anvils and member, and cam means arranged on the memberand connected to the said links, said cam means being effective toinfluence the movements of the plunger and the anvils in sequentialorder.

5. In a stapling machine of the kind described, in combination, a memberslidably mounted in said frame, manually operable means connected to theframe and effective to reciprocate the member, cam tracks arranged in anupper portion of the member, a staple driving plunger, means operablyconnecting the cam tracks and the plunger, a pair of staple clinchinganvils, other cam tracks arranged in a lower portion of the member, andother means operably joining the anvils and said last-mentioned camtracks.

WERNER SCHAFROTH.

REFERENCES CITED The following references are of record in the le ofthis patent:

Number UNITED STATES PATENTS Name Date Brown Jan. 8, 1895 Reinhold Apr.13, 1897 Matveyei Mar. 1'7, 1931 Vogel Dec. 15, 1931 Matveyei Sept. 20,1932 Palzer July 17, 1934 Taylor Aug. 20, 1935 Vogel Mar. 10, 1936 FodorMay 12, 1936 Matveyei Sept. 15, 1936 Schafroth May 18, 1937 MatveyeiDec. 5, 1939 Pankonin Mar. 24, 1942 La Place Jan. 19, 1943

